Force-pump



(No Model.) f

H. C. STOUFFER.

FORGE PUMP.

Patented Sept il l) HlRAM O. STOUFFER, OF CORTLAND, OHIO.

FORCE-PUMP.

SPECIFICATION formingy part of Letters Patent No. 389.419, dated September 11, 1888.

Application filed April 9, 1888. Serial No. 270.081.

To all whom it may concern:

Be it known that l, HIRAM C. S'roUrFnR, a citizen of the United States, residing at Oortland, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Force-Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to provide a continuous stream of water with an easy operation of the pu mp; and for this purpose my invention consists of an improved construction pump in which a hollow plunger-rod operates two pistons in cylinders of unequal dian'ieters placed one above the other, the cylinder of least diameter being the upper one, and the space between the pistons having an air-vent through the hollow plunger-rod of the upper piston, whereby air is admitted into and allowed free escape from the cylinder-space between the pistons through the upper section of the plunger-rod. This construction gives the advantage of using closed cylinders with a hollow plunger-rod for the lower piston, through which water passes from the lower into the upper cylinder,and a hollow plungerrod for the upper piston, through which air passes into and from the two cylinders in the up and down strokes ofthe pistons. This interior free air communication in a closed pumpcylinder having double pistons operating to keep the upper cylinder supplied with water whether the pistons be ascending or descending is the important matter of my invention.

In the accompanying drawings, which forni a part of this specification, and in which the same reference-letters indicate corresponding parts, Figure l represents a vertical section of my improved pump, showing the pistons forced down 5 Fig. 2, a vertical section of the pump, showing the pistons ascending; Fig. 3, a side elevation of the pistons, their couplingrod, and the lower end ofthe piston-rod; Fig. 4, a detail bottom view of the upper piston, showing the air-vents; and Fig. 5 is a section of the upper piston, showing the water-way and the air-vents.

In the drawings, the letter A indicates the 5 lower larger cylinder, which is provided with (No model.)

a seat, B, at its lower end, upon which an upwardly-opening valve, O, is sea-ted and works. Ihe upper cylinder, D, is of about the same length as said lower cylinder and of a smaller diameter than the same, and is secured with its lower end in the upper end of said lower cylinder, being either integral with the same or tightly secured to the saine, and the dischargethe valveseat K, which is screwed into the lower end of said piston, clamping said packing-ange, and has' the upwardly-opening valve L playing upon it.

The tubular connecting-rod M is secured in the upper end of said domeshaped lower piston, and the upper piston, N, which operates in the upper cylinder, is secured to the upper end of said tubular rod or upper piston. This upper piston consists of an upper body portion, O, which is secured to the lower end of the tubular piston-rod P, which is open to the air and has a channel or passage, Q, which forms a continuation ofthe bore ofsaid rod. The upper screw-threaded end ofthe tubular connecting or coupling rod M is screwed into a socket, R, in the lower end of said body portion O and opens into the bottom of a recess, S, in the side of said portion, which recess opens into the upper cylinder. The lower cylindrical portion, T, of the piston is screwed with its central screw-threaded bore R upon the upper threaded end of the tubular coupling-rod, clamping the upwardlyturned packing-flange V between it and said body portion, and is formed with an annular recess, WV, in its upper face, and with air passages or holes X,which extend from said recess to its under side and open into the lower cylinder.

The upper end of the tubular piston-rod :is suitably secured to its handle or other operat- IOO a sea-L16 ing mechanism, and is provided with perforations Y, for connecting its interior with the outer air.

The operation of the pump is as follows: Vhen the piston-rod and pistons are raised, the water is drawn through the lower valveseat into the lower cylinder, filling the same. When, now, the piston-rod and pistons are depressed, the water will how through the lower piston and be forced up through the tubular connecting-rod into the upper cylinder above the upper piston and will fill said cylinder, and, on account of the lower cylinder being larger than the upper cylinder, a quantity of water will pass ont at the nozzle, but leaving the cylinder full,or nearly so. When the piston-rod and pistons are again raised,the powerpiston will again draw water into the lower cylinder,while the upper piston will lift the water left above it in the upper cylinder and force it out through the discharge-nozzle, so that a continuous stream will ow out at the nozzle at both strokes of the piston-rod and pistons.

On account of the lower cylinder being larger in diameter than the upper cylinder, the lower piston would be retarded in its upstroke by the compression of the air above it and in its downstroke by the rarefying of the air above it; but this is prevented by the tubular piston-rod and the passages through the upper piston,which admit of the air above the lower piston escaping through said passages and piston-rod, when it is compressed by the lower piston being raised and of the air re-entering the space above the lower piston when the latter is forced down. In this manner it will be obvious that the pump may discharge a continuous stream atits nozzle, and that there will be no resistance of the air between the pistons during the operation of the pump.

On account of the air-vent for the space between the pistons being formed through the piston-rod, the pump may be used in drilled wells or in any desired places or positions without anyr danger of fouling the pump with sand, dirt, or other small objects, as is liable to happen when openings are provided in the sides of the cylinders for the escape and inlet of air 5 and this pump will occupy less space on account of its having a vent through the piston-rod than the pumps of this class which are provided with air-chambers and connecting channels or passages upon the sides of the cylinders. In this way my improved pump operates by itslower piston with a forcing action through a hollow plunger-rod and by its upper piston with a lifting action.

l may provide the upper portion of the lower cylinder with one or more side holes for the escape of water which may leak past the pistons.

Having thus fully disclosed the construction of my improved pump, its operation and advantages, what I claim as new is- 1. A piston lfor force-pumps, consisting of two plunger parts of unequal diameters, the

lower part being hollow and having a footvalve, and the upper part havingtwo vertical openings passing through it,a tubular pistonrod connecting the chamber of the lower plunger part with one of said openings of the upper plunger part and with achamber above the latter, and a tubular operating-rod open at its upper end and connecting at its lower end with the other opening of said upper plunger part, the said tubular operating-rod forming an air-conduit opening between the plunger parts and the tubular piston-rod, forming a perpetual open water-conduit communieating with a chamber above the upper plunger part, substantially as described.

2. The pump-cylinderpart having a smaller diameter provided with a top outlet, and a lower cylinder part of a larger diameterprovided with an inlet foot-valve, each cylinder having a piston, the smaller one of which having two through-openings,one of which opens into the larger cylinder part above the lower piston, and the other opens into the smaller cylinder part above the upper piston, the larger piston being hollow and having an inlet-valve, a tubular piston-rod connecting the hollow piston with the smaller cylinder part, and a tubular coupling-rod connecting the larger cylinder part with the open air between said pistons,substantially as described.

3. In a pump, the combination, with an upper cylinder of a smaller diameter and a lower cylinder of a larger diameter, a lower piston in said lower cylinder, -a tubular couplingrod -secured in said lower piston and formed with a screw-threaded upper end, a tubular' piston-rod, an upper piston-body in said upper cylinder and secured to said piston-rod, and formed with a channel through it which forms a continuation of said rod, and with a recess at the side which has the tubular connecting-rod openingintoit,a packing-liangev at the lower end of said piston-body, and a lower piston portion screwed upon the upper end of'said tubular coupling-rod to clamp said packing-fiange against said piston-body, and formed with passages through it and with an annular recess in its upper face, substantially as described.

4. In a pump, the combination of thelower larger cylinder, A, formed with seat B and valve C, the upper smaller cylinder, D, the discharge-pipe E, formed with the nozzle F and guide-tube G, the lower piston, I, pro- IOO IIO

IZO

vided with the upwardly-opening valve L,

the upper valve, O T, provided with the recess S and channel Q, the tubular couplingrod M, and the tubular pistonrod l?, formed with vent-openings at the upper end, substantially as and for the purpose described.

5. A pump-cylinder having an upper section ofsmaller diameter and alower section of larger diameter, in combination with a piston for each cylinder coupled by a hollow piston-rod opening into the upper cylinder,and a hollow operating piston-rod open to the outer air and oinniunicating with the interior of both cylin ders between the pistons, substantially as described.

6. In a pump, two pistons coupled by a hollow rod, the lower piston having a Valve and the upper piston having a free passage for the hollow coupling-rod opening upward, and a hollow operating pistonrod open at its upper end to the outer air and havinga free passage through said upper piston opening downward, in combination with the cylinders A and D, the upper one being of less diameter than the lower one, and wit-hin which the pistons cooperate in the way described.

7. In a pump,two cylinders of equal length, one above the other, the lower one being of greater diameter than the upper one and open ing into each othei` at theirjunction,tl1e lower cylinder having a foot-valve and the upper cylinder a dischargenozzle, in combination with a valved piston for the lower cylinder, a

non-valved piston for the upper cylinder, a hollow coupling-rod for the pistons opening into the upper cylinder, and a hollow operating piston-rod opening into both cylinders and to the outer air, as described, for the purpose specified.

8. The top cylinder part having the dischargeopening and the bottom cylinder part, the wall-openings a at or near its junction with the top cylinder part, in combination with the pistons and the hollow piston-rod,the upper section of which opens into the lower cylinder part above the said wall-openings,as herein set forth.

In testimony whereofl have affixed my signature in presence of two witnesses.

HIRAM C. STOUFFER.

Vi tn esses:

A. E. H. J oHNsoN, J oHN M. Lilw'roN. 

